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Directional valve actuators. Direct actuation (manual and mechanical). Port labeling. Operation of a 3-port, 2-position mechanical valve. Pilot actuation. Electrical actuation. Electro-pneumatic actuation.
a These tables are shown along with figures showing the directional control valves and their valve actuators. In Step 12, you will associate each PLC digital output with a valve actuator.
a Avoid using a pencil or other instrument that will leave marks on the valves. Do not use an instrument with a sharp point that could damage the valves. Do not use the probe of a multimeter as the wire connected to the probe could dangle on the workstation and be caught in an actuator.
a As a systems operator, you should be able to localize malfunctions and identify their causes and sources. In some cases, you will be able to fix the malfunction yourself. In many cases, however, you will be required to document the malfunctions and pass this information onto the appropriate experts for resolution. Be as precise as possible in describing the problem. Refer to all components using the correct names and device tags as shown in the system plans.